Defensive publicationt



yl DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED OCTOBER 21, 1969 819,948 HIGH CONTRAST ELEMENTS AND FILM DE- VELOPERS CONTAINING NITRON AND POLYALKYLENE GLYCOL Lewis T. Connolly and Eugene D. Salesin, both Kodak Park Division, Rochester, N.Y. 14650 Filed Apr. 28, 1969. Published Oct. 21, 196

Int. Cl. G03c 5/30 I U.S. CI. 96-66 No Drawing. 17 Pages Specification High contrast photographic elements comprising a support and photographic silver halide to which nitron and polyalkylene glycol or a derivative thereof has been added; a developer, for high contrast photographic elements, comprising nitron and the use of said developer in the process of developing high contrast photographic elements of improved dot quality. 

